Masayoshi Son Ascends to Asia’s Wealthiest Amid AI-fueled Market Surge

SoftBank Group’s Masayoshi Son has risen to become Asia’s wealthiest individual as the artificial intelligence surge fuels unprecedented market momentum, propelling his investment conglomerate to a historic valuation peak, surpassing Toyota Motor as Japan’s most valuable company by market capitalization.

The 68‑year‑old billionaire now commands a net worth of $97 billion, primarily derived from his SoftBank holdings, according to Forbes estimates, eclipsing Reliance Industries chief Mukesh Ambani’s $90 billion fortune to claim the top spot as Asia’s richest person.

With a market capitalization of $298 billion, SoftBank’s shares have surged more than 80% year‑to‑date, driven by Son’s AI‑focused investments that have intensified investor optimism. In a recent CNBC interview, the mogul asserted that the AI revolution dwarfs the dot‑com era by a factor of roughly fifty.

“I consider this opportunity to exceed tenfold, potentially reaching fiftyfold, the magnitude of the dot‑com boom,” Son remarked, announcing the previous day an up‑to‑€75 billion ($87 billion) commitment to AI infrastructure, including data‑center development across France.

Moreover, as AI‑driven demand accelerates, SoftBank’s portfolio companies are rallying, bolstering the parent company’s share price. The primary catalyst of this rally is Nasdaq‑listed chipmaker Arm Holdings, in which the Japanese conglomerate holds nearly a 90% stake, per senior equity analyst Dan Baker of Morningstar.

The British firm, whose shares have risen more than 250% this year, forecasted on Tuesday that it could surpass its $15 billion chip‑sales target ahead of schedule. In March, Arm introduced its first proprietary chip, transitioning from mere licensing of chipmaking technologies. The company projected sales of that magnitude within five years, with annual revenue expected to reach $25 billion—over six times the 2025 earnings.

Meanwhile, investors speculate that OpenAI, the ChatGPT creator in which SoftBank has invested over $30 billion, could attain an even higher valuation. Under billionaire Sam Altman’s leadership, OpenAI was valued at $852 billion in late March after securing $122 billion from backers such as Amazon, Nvidia, and the Japanese conglomerate.

The American AI titan now finds itself in a competitive race with fast‑growing rival Anthropic to launch an initial public offering, each seeking to attract capital by leveraging early‑mover advantages. SoftBank has pledged an additional $20 billion investment in OpenAI by October, positioning itself to benefit from any further appreciation of the company. Should OpenAI go public, its valuation could approach $1 trillion, amid heightened market enthusiasm for mega‑offering ventures such as Elon Musk’s SpaceX, which is reportedly aiming to raise $75 billion; this perspective was highlighted by Hironori Akizawa, senior fund manager at Tokio Marine Asset Management in Tokyo.

Despite his extensive AI commitments, Son has continued to exercise fiscal discipline. SoftBank’s leverage, measured by loan‑to‑asset value, slipped to 17% from 18% in the fiscal fourth quarter, per a May research note from Morningstar. The company maintains a self‑imposed leverage ceiling of 25%, having previously drawn significant market concern due to higher borrowing levels.

However, Deutsche Bank analyst Peter Milliken warns in a Tuesday research note that the path ahead will not be entirely smooth. OpenAI confronts intense competition from Anthropic, which surged past it to reach a $965 billion valuation after a May funding round. Additionally, the rising popularity of cheaper, open‑source AI models could erode OpenAI’s sales growth.

“The recent success stems largely from astute investing, compounded by a bull market that increasingly exhibits signs of mania,” the analyst wrote. “Analysts and investors appear to have become fixated on short‑term momentum, showing less interest—or lacking the capacity—to chart a detailed, long‑term trajectory with assumptions.”

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